This man tracked his country's populace by establishing the first Parish registrations. The Truce of Altmark ended this ruler's war with Poland, and gave his country Livonia; that war was against the king his father deposed, King Sigismund III. This ruler's [*] chancellor, Axel Oxenstierna, continued to fight the war in which this ruler died while fighting Wallenstein at the Battle of Lützen.  In 
This man tracked his country's populace by establishing the first Parish registrations. The Truce of Altmark ended this ruler's war with Poland, and gave his country Livonia; that war was against the king his father deposed, King Sigismund III. This ruler's [*] chancellor, Axel Oxenstierna, continued to fight the war in which this ruler died while fighting Wallenstein at the Battle of Lützen.  In that same war, this king had defeated Catholic forces under Tilly at the Battle of Breitenfield.  For 10 points, name this Swedish king, who aided the Protestants in the Thirty Years' War.
This man tracked his country's populace by establishing the first Parish registrations.
Gustavus II {Adolphus} [do not accept “{Gustav}[us] {I”}]